:root{--cream:#F4FBF4;--deep-bg:#E6F3E8;--white:#fff;--soft:#D8EEDC;--title:#0F3D24;--text:#1A3D28;--muted:#3E6B4E;--muted2:#6A8A72;--green:#1F8A4C;--bright:#2EA860;--deep:#0F3D24;--leaf:#7AC994;--gold:#E8C458;--border:rgba(31,138,76,.18);--border-strong:rgba(31,138,76,.45);--shadow:0 14px 36px rgba(15,61,36,.12);--radius:16px;--max:1220px}*{box-sizing:border-box}html{scroll-behavior:smooth;background:var(--cream)}body{margin:0;background:linear-gradient(180deg,var(--cream),#fff 38%,var(--deep-bg));color:var(--text);font:16px/1.8 system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;overflow-x:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}.shell{width:min(var(--max),calc(100% - 32px));margin:0 auto}.site-head{position:fixed;z-index:50;inset:0 0 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